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QC 2 LEC > M3L3 > Flashcards

M3L3 Flashcards

1
Q

QUALITY CONTROL TEST FOR SOLUTIONS

A
  1. Appearance
  2. Stability
    • Physical
    • Chemical
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2
Q

QC TESTS FOR SOLUTIONS

  • ensures that there is NO PRESENCE of particles, color change, cloudiness
A

APPEARANCE TEST

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3
Q

QC TESTS FOR SOLUTIONS

  • maintains properties over time under different conditions
A

STABILITY TEST

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4
Q

QC TESTS FOR SOLUTIONS | STABILTY

  • viscosity
  • density
A

PHYSICAL TEST

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5
Q

QC TESTS FOR SOLUTIONS | STABILITY

  • confirms COMPOSITONand CONCENTRATION
A

CHEMICAL TEST

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6
Q

QC TESTS FOR SUSPENSIONS

uses the formula Vs = Vu/Vo

A

SEDIMENTATION VOLUME TEST

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7
Q

QC TESTS FOR SUSPENSIONS

SEDIMENTATION VOLUME:
Vs

A

SEDIMENTATION VOLUME

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8
Q

QC TESTS FOR SUSPENSIONS

SEDIMENTATION VOLUME:
Vu

A

SETTLED VOLUME

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9
Q

QC TESTS FOR SUSPENSIONS

SEDIMENTATION VOLUME:
Vo

A

UNSETTLED VOLUME

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10
Q

QC TESTS FOR SUSPENSIONS

SEDIMENTATION VOLUME:
formula

A

Vs = Vu / Vo

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11
Q

QC TESTS FOR SUSPENSIONS

SEDIMENTATION VOLUME:
____ Vs is BETTER

A

HIGH

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12
Q

QC TESTS FOR SUSPENSIONS

SEDIMENTATION VOLUME:
Vs = 1.0

A

FLOCCULATED equilibrium

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13
Q

QC TESTS FOR SUSPENSIONS

SEDIMENTATION VOLUME:
Vs < 1.0

A

NOT flocculated

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14
Q

QC TESTS FOR SUSPENSIONS

  • it refers to the amount of FORCE to redisperse or resuspend the particles
  • the requirement is that NO SEDIMENT should remain at the base after shaking
A

REDISPERSABILITY TEST

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15
Q

QC TESTS FOR SUSPENSIONS

  • determined by: Microscopy, Coulter counter
A

PARTICLE SIZE MEASUREMENT

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16
Q

QC TESTS FOR SUSPENSIONS

PARTICLE SIZE MEASUREMENT:
the ideal size for suspensions

A

.>1um
greater than

17
Q

QC TESTS FOR SUSPENSIONS

a test for FLOWABILITY and VISCOSITY

A

RHEOLOGIC PROPERTY

18
Q

QC TESTS FOR SUSPENSIONS

  • it is done by CENTRIFUGATION
  • test for CRYSTAL GROWTH
A

TEMPERATURE & GRAVITATIONAL STRESS

19
Q

QC TESTS FOR SUSPENSIONS

TEMP & GRAVITATIONAL STRESS:
HIGH temperature

A

formation of crystals

20
Q

QC TESTS FOR SUSPENSIONS

TEMP & GRAVITATIONAL STRESS:
LOW temperature

A

precipitation / phase separation

21
Q

QC TESTS FOR SUSPENSIONS

  • refers to the REPULSIVE FORCES among particles
  • a HIGHER ____ is MORE desirable because suspensions tend to have a SLOWER RATE of settling
A

ZETA POTENTIAL DETERMINATION

22
Q

QC TESTS FOR SUSPENSIONS

ZETA POTENTIAL DETERMINATION:
a ____ zeta potential is MORE DESIRABLE

23
Q

QC TESTS FOR SUSPENSIONS

ZETA POTENTIAL DETERMINATION:
suspensions tend to have a ____ of settling

A

SLOWER RATE

24
Q

QC TESTS FOR EMULSIONS

  • uses dyes which are SOLUBLE in the EXTERNAL PHASE
  • Amaranth green
  • Sudan red
A

DYE SOLUBILITY TEST

25
Q

QC TESTS FOR EMULSIONS

DYE SOLUBILITY TEST:
dyes are SOLUBLE in the ____ phase

26
Q

QC TESTS FOR EMULSIONS

DYE SOLUBILITY TEST:
WATER SOLUBLE dye

A

Amaranth green

27
Q

QC TESTS FOR EMULSIONS

DYE SOLUBILITY TEST:
OIL soluble dye

28
Q

QC TESTS FOR EMULSIONS

UV FLUORESCENCE:

QC 2 LEC (7 decks)

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